mural

noun
  1. A large painting or artwork applied directly on a wall or ceiling surface. noun
    The artist spent weeks completing the mural on the side of the building.
    The community center features a vibrant mural that depicts the history of the neighborhood.
  2. Relating to or resembling a wall; wall-like. adjective
    The mural decorations in the ancient temple were remarkably well-preserved.
    The mural structure of the fortress was designed to withstand sieges.